Solder Connection

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EF-2100 - VOC Free Wave Soldering Flux

ALPHA® EF-2100 is Alpha’s latest VOC-free, halide-free flux designed to meet current REACH and RoHS legislation. ALPHA® EF-2100 is a drop in replacement for users of EF-2210, EF-2202, WB-400 & NR-300 who wish to use a   non-toxic product.

EF-2100 shows stable performance compared to EF-2210, Alpha’s leading VOC-free flux. The solderability has shown to  be equivalent in  hole-fill, solder balling and bridging while providing  good lead-free  solder joint cosmetics with an evenly spread, tack free residue.

Key Products Features & Benefits:  

  • VOC-Free    
  • Halide-Free    
  • Zero Rosin    
  • Low Solids    
  • No-Clean Chemistry


Product Number : EF-2100

Data Sheets and Info

Health & Safety

Technical Bulletin

Product Flyer

Product Guide

ROHS Certificate

Related Technical Documents


Q - What is colophony and can it cause any health issues?
A - Colophony is a generic term for rosin, this is the sap or sticky substance that derives from pine and spruce trees. Its "stickiness" lends itself to being used in a wide range of products. We have traditionally used this product in fluxes due to these specific properties it can however lead to breathing difficulties and skin sensitivity. Always use fume filtration when soldering and change filters regularly.

Q - What is the difference between rosins and resins?
A - The terms are often used interchangeably, but rosin is a naturally occurring substance, and resin is either a modified rosin or completely synthetic material. Rosins are plant based products and are subject to more natural variation than resins, however resins are commonly used in newer flux formulations due to their more consistent performance.

Q - How does IPCJ-STD-004B flux classification work.
A - Flux designation has three components. The first two letters, RO, RE or OR, represent the basic chemical composition: rosin-based, resin-based or organic acid-based. The next component is flux designation, L, M or H, which describes the flux’s activity level as low, medium or high, and the final component, 0 or 1, this indicates if halides are present.

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